The present invention relates to a sabotage protected lock formed like a metal mountings having an opening through which wires, lines or chains can be inserted to be secured inside or enclosed by said metal mountings, wherein one wire is anchorable in an anchoring point and another wire is anchorable in an object, e.g. a road machine, a post in a wire raek. The enclosing metal portion is fixable in position in the anchorage points of the metal mountings, at least one of which is enclosed by a sabotage protected, impact resistant metal envelope in order to lock the enclosing metal portion to the anchorage point concerned and secure the metal envelope. When a locking function is unlocked the metal envelope is released and the enclosing metal portion can be opened and the wires be loosened so that he object can be released.

There are different locks on the market to secure different objects such as bicycles, boats, etc., so that they are prevented from being stolen. This is achieved by anchoring the object with wires, lines or chains fastened there, which wires, lines or chains are secured by single locking devices, which can be opened and closed by means of an enclosing portion arranged in them, which portion is unable to tolerate stresses from high tensile forces under which the wires can easily be loosened from the locking device in the event of sabotage. The enclosing portion can be securely locked, e.g. with a split pin passing through the enclosing portion and part of the locking device, and can be securely locked there in its position with a padlock, for example. The problem is that a padlock, the split pin and the enclosing portion are easy to sabotage with tools for opening the enclosing portion and releasing the wires, enabling the object to be easily removed. According to WO94/18424 a metal envelope is use to protect a padlock against sabotage. However, the enclosing portion is not enclosed by a metal envelope and objects hkely to be stolen may therefore become accessible to sabotage. The patent specification SE 521 213 discloses a method of using a wire comprising an U-shaped mountings with an enclosing portion. This is not protected against sabotage with a metal envelope over the enclosing portion either. The above mentioned structures are easy to sabotage and are therefore unable to lock an object effectively and securely, such as a heavy road machine in a guardrail.

The object of the present invention is to solve the problems associated with the above-mentioned structures by securely anchoring the enclosing portion fastening the wires in anchorage points, at least one of which is enclosed by an impact resistant, sabotage protecting metal envelope, which is securely locked to the anchorage point concerned, so that it is rendered inaccessible to sabotage. When the metal enclosure is unlocked it is loosened to open the sealing part.

Thanks to the invention a single, low cost, sabotage protected solution has now been developed to prevent the theft of heavy objects that are likely to be stolen, e.g. a road machine, or to prevent a wire lock in a wire rack from being opened. According to the invention a metal mountings has an opening through which two wires or their ends are inserted in order to be enclosed there and secured inside the metal mountings of an enclosing metal portion, which seals the opening. The metal mountings must absorb a load of up to 10 tonnes, which is applied to both wires, one of which is anchored in an anchorage point and the other anchored in the object liable to be stolen. The enclosing metal portion is fixed in position in the metal mounting in two anchorage points on each side of the opening. One of the anchorage points is articulated in a sabotage protected manner and the other, which is to be opened and sealed, is enclosed, according to the invention, by a sabotage- protecting impact resistant metal envelope which has enclosing walls, one wall of which has a hole through which a locking element is inserted so that it securely locks, inside the metal envelope, the enclosing metal portion to the other anchorage point, thereby fastening the metal envelope. The locking element then securely locks and position fixes the metal envelope inside it by means of a locking function, which is arranged in an impact resistant manner in another wall. When unlocked, the locking element is loosened from the anchorage point in question by means of the locking function, enabling the locking element to be released from the hole. The metal envelope can then be released from the enclosing metal portion, which can then be opened for exposing the wires to loosen the object.

In a preferred embodiment of the invention the metal mounting is designed as an U-formation, whose legs in the "U" in their upper parts each have their anchorage point, one of them constituting the sabotage protecting articulating function at the first end of the enclosing metal portion, and which, with its other end, can be securely locked by means of the locking element to the other anchorage point and is enclosable by the metal envelope.

The invention is described in greater detail below with reference to a preferred exemplary embodiment in the attached drawings, in which

Fig. 1 shows a side view of a road machine, which is securely locked by a metal mountings in an anchorage point,

Fig. 2 shows a vertical section through an U-shaped metal mountings and a metal envelope in a locked position, and

Fig. 3 shows a horizontal section through the U-shaped metal mountings and the metal envelope.

Figures 1-3 show a sabotage protected lock formed like a metal mountings 1 having an opening 4 through which two wires, lines or chains 2 have been inserted with their ends 6 in order to be enclosed and secured inside the metal mountings 1 of an enclosing metal portion 3, which encloses the opening 4. The metal mountings 1 must tolerate a tensile force of up to 10 tonnes applied to the wires 2, one of which is anchored in an anchorage point 5, a second wire 2 being anchored in an object 14 liable to be stolen, which may be a road machine, which in this case will be difficult to steal. The enclosing metal portion 3 is fixable in position in the metal mountings I in two anchorage points 8. One of these is enclosed by a sabotage protecting, impact resistant metal envelope 9, which has enclosing walls 10 and a hole 12 through which a locking element 11 can be inserted, so that it securely locks the enclosing metal portion 3 inside the metal envelope at one anchorage point 8 and fastens the metal envelope 9. The locking element 1 1 is actuated by a locking function 13, which is arranged in the metal envelope 9. e.g. by means of a key. When the locking function 13 is unlocked, the locking element 1 1 is loosened, which this case can be pulled out of the hole 12, at which point the metal envelope 9 can be released from the enclosing metal portion 3, which can then be opened to expose at least one wire 2, enabling object 14 to be loosened.

As shown in Figs. 2 and 3, the metal mountings 1 is designed as an U- formation 20, whose legs 28 in the "U", in their upper portions 26, each have an anchorage point 8, where one of them constitutes an articulating function 21 , which is sabotage protected at a first end 24 of the enclosing metal portion 3 and which, with its other end 25, is anchorable by means of the locking element 11 at the other anchorage point 8, and is enclosable by the metal envelope 9. The metal envelope 9 encloses the encl osing metal portion 3 and the anchorage point 8 with only one small opening between these parts and the inner side 18 of the wall 10 of the metal envelope 9, making it difficult to sabotage the locking function 13 and the other anchorage point 8 with a tool. The enclosing metal portion 3 comprises an essentially straight, oblong body, which consists of two elongated flat bars 29, which face each other and whose ends 24, 25 each have their spacer 30 between the flat bars 29, thus creating an interval between them, for connecting them together. The flat bars 29 form said upper portions 26 and the outer sides 27 of the legs 28 are turned away from a space 31 between them. The outer sides 27 each have their recess or cut-out 33 in the upper portions 26, said recess or cut-out 33 is semicircular in shape and extends transversely to the longitudinal direction of the legs 28, so that the spacers 30, which have the shape of round bars or tubes and fit into said recesses 33. The locking element 1 1 consists of a split pin 15, which has a first end 16 from which it is accessible for pulling out from the hole 12 when the locking function 13 is in the unlocked position. When split pin 15 is in the locked position it is fixed in position in an opposing hole 12, where the inner side 18 of an existing wall 10, at the other end 17 of the split pin 15, where it is enclosed by a collar formation 19, is designed to secure it in the event of sabotage. The o .her end 25 of ihe enclosing portion 3 extends in a preferred variant of the invention a little further past one of the legs in the form of a projecting portion 34, which projects approx. 3-8 cm past the outer side 27. A lever arm 32, which has a clamping part at the other end 25, is arranged between the flat bars 29. The lever arm 32 is movably arranged around a rotary shaft between the flat bars 29, which then simultaneously constitute the spacer 30. The lever arm 32 is clamped by the strength of a hand pressing against it and by the split pin 15, which extends transversely through the flat sides of the Hat bars 29 in holes or recesses 37 that exist there and transversely to the longitudinal direction of the legs 28. The spacer then constitutes a sabotage protected articulating function 21 at the first end 24, since at that point it is very tightly clamped by the lever arm 32, which has a locking lug 7, which fixes the lever arm 32 in a position, where it clamps most tightly against the recesses 23 at the first end 24 and at the other end 25 near the tip of the lever arm. In this position the locking lug 7 then constitutes a stop against the outer side 27. Obviously the sabotage protected articulating function 21 may consist of a hinge function whereby the spacer 30 passes through a hole in the upper portion 26 at the first end 24 instead of consisting of the recess 33. The U-formation 28 consists of a homogeneous square bar or round bar, whose side or diameter is approx. 2-4 cm. The height of the legs is approx. 8-10 cm. The straight enclosing portion 3 with the projecting portion is normally approx. 20-25 cm long, but can be made considerably longer in special applications. The envelope surface of the split pin 15 has, in approximately its centre, a cut-out 23 which is located inside the metal envelope 9 in tiie locked position, through which the cut-out 23 a movable locking tab 22 can be moved by means of the locking function 13 against this applied force, so that in the locked position it securely locks the split pin 15 in the cut-out 23 and, in the unlocked position, is released from the split pin 15 to expose the metal envelope 9. The hole 12 has an enclosing collar 35 for protecting the first end 16 of the split 10 in the pin in the outer side of the wall 10, thereby making it difficult to gain access to the first end 16 and attempt to loosen it. The metal mountings 1, the split pin 15, the walls 10 and the locking tab 22 are made of a steel material with a hardness of 370-430 HBW, a yield point of approx. 1000 MPa and an ultimate tensile strength of approx. 1250 MPa, the steel being fine grain treated. The walls 10 form a box formation having a bottom, two long sides, a roof and an end arranged furthest away from the outer side 27, which has the locking function 13. One of the long sides has the hole 12. The box formation has an open end constituting an inlet 36 for inserting the projecting portion 34, which is afterwards located next to the outer side 27 when the metal envelope 9 is securely locked, said walls 10 intersect in corners formed as a fold of a steel plate approx. 5 mm thick or with a welded joint.